How to get sudo on Your ubuntu

How to get sudo on Your ubuntu 1. Restart ubuntu and then press "shirft" to go to the grub menu. 2. Select "recovery mode" and press "e" to go to the editing page; 3. Replace ro single with rw single init =/bin/bash; 4. Press ctrl + x to enter single-user mode. The current user is root; 5. Add the write permission for the file. That is, enter the command "chmod u + w/etc/sudoers ". 6. Edit the/etc/sudoers file. That is, enter the command "vim/etc/sudoers", enter "I" to enter the editing mode, and find this line: "root ALL = (ALL) ALL "add" xxx ALL = (ALL) ALL "(here xxx is your user name), and save it (that is, press the Esc key first, and then enter ": wq ") quit. 7. revoke the write permission of a file. That is, enter the command "chmod u-w/etc/sudoers ". 8. Press ctrl + alt + del to restart;